)

func parse(str string, semver bool) (*Version, error) {
	parts := versionMatchRE.FindStringSubmatch(str)
	if parts == nil {
		return nil, fmt.Errorf("could not parse %q as version", str)
	}
	numbers, extra := parts[1], parts[2]

	components := strings.Split(numbers, ".")
	if (semver && len(components) != 3) || (!semver && len(components) < 2) {

	var tests = []struct {
		version               string
		semver                bool
		expectedComponents    []uint
		expectedMajor         uint
		expectedMinor         uint
		expectedPatch         uint
		expectedPreRelease    string
		expectedBuildMetadata string
	}{
		{
			version:            "1.0.2",
			semver:             true,
			expectedComponents: []uint{1, 0, 2},
			expectedMajor:      1,

	cv := semver.Canonical(v)
	if semver.Build(v) == "+incompatible" {
		cv += "+incompatible"
	}
	return cv
}

// Sort sorts the list by Path, breaking ties by comparing [Version] fields.
// The Version fields are interpreted as semantic versions (using [semver.Compare])
// optionally followed by a tie-breaking suffix introduced by a slash character,
// like in "v0.0.1/go.mod".
func Sort(list []Version) {

		},
		"version-bad": {
			wantFailures: field.ErrorList{field.Invalid(field.NewPath("instances").Index(0).Child("attributes").Index(0).Child("version"), "1.0", "must be a string compatible with semver.org spec 2.0.0")},

			continue
		}

		if err := module.CheckPathMajor(v, r.pathMajor); err != nil {
			if r.codeDir == "" && r.pathMajor == "" && semver.Major(v) > "v1" {
				incompatible = append(incompatible, v)
			}
			continue
		}

		list = append(list, v)
	}
	semver.Sort(list)
	semver.Sort(incompatible)

	return r.appendIncompatibleVersions(ctx, tags.Origin, list, incompatible)
}

				continue
			}
			if module.IsPseudoVersion(m.Version) && (latestPseudo == "" || semver.Compare(latestPseudo, m.Version) > 0) {
				latestPseudo = m.Version
			} else if semver.Prerelease(m.Version) != "" && (latestPrerelease == "" || semver.Compare(latestPrerelease, m.Version) > 0) {
				latestPrerelease = m.Version
			} else if latestRelease == "" || semver.Compare(latestRelease, m.Version) > 0 {
				latestRelease = m.Version
			}
		}

		rev:  "v1.0.0",
		err:  `resolves to version v0.1.1-0.20220202191944-09c4d8f6938c (v1.0.0 is not a tag)`,
	},
	{
		// Git branch with a semver name, matching go.mod file, and disallowed +incompatible version.
		// The version/tag mismatch takes precedence over the +incompatible mismatched.
		vcs:  "git",
		path: "vcs-test.golang.org/git/semver-branch.git",
		rev:  "v2.0.0+incompatible",

// in the Tags method's Origin calculation.
// We can safely ignore tags that are not look like pseudo-versions,
// because ../coderepo.go's (*codeRepo).Versions ignores them too.
// We can also ignore non-semver tags, but we have to include semver
// tags with extra suffixes, because the pseudo-version base finder uses them.
func isOriginTag(tag string) bool {
	// modfetch.(*codeRepo).Versions uses Canonical == tag,

				err = migrator.MigrateIfNeeded(end)
				if err != nil {
					t.Fatalf("Migration failed: %v", err)
				}
				err = server.Start(end.version)
				if err != nil {
					t.Fatalf("Start server failed: %v", err)
				}
			})

			// Check that all test values can be read back from all the servers.
			parallel(servers, func(server *EtcdMigrateServer) {
				for _, s := range servers {

	for _, line := range allLine {
		f := strings.Fields(line)
		if len(f) >= 1 && semver.IsValid(f[0]) && strings.HasPrefix(f[0], prefix) && !module.IsPseudoVersion(f[0]) {
			list = append(list, f[0])
		}
	}
	p.listLatestOnce.Do(func() {
		p.listLatest, p.listLatestErr = p.latestFromList(ctx, allLine)
	})
	semver.Sort(list)
	return &Versions{List: list}, nil
}